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                    3.2 画个正方形
            
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                    3.3 画个立方体
            
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                    4. 着色器
            
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                    4.1 着色器是什么
            
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                    4.2 Unity Shader和OpenGL Shader
            
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                    4.4 片段着色器
            
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                    5. 绘制贴图
            
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                    5.1 颜色和贴图
            
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                    5.2 贴图文件介绍
            
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                    5.3 CPU与GPU的通信方式
            
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                    5.4 使用stb_image解析图片
            
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                    5.5 绘制带贴图的立方体盒子
            
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                    5.6 压缩纹理
            
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                    5.7 图片压缩工具
            
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                    5.8 使用压缩纹理
            
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                    6. 缓冲区对象
            
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                    6.1 顶点索引
            
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                    6.2 缓冲区对象
            
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                    7. Mesh和材质
            
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                    7.1 导出Mesh文件
            
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                    7.2 使用Mesh文件
            
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<p>&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x7684;&#x529F;&#x80FD;&#x5C31;&#x662F;&#xFF1A;<font color="green">&#x8F93;&#x51FA;&#x989C;&#x8272;</font>&#x3002;</p>
<p>&#x5728;&#x4E0A;&#x4E00;&#x8282;(&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;)&#x91CC;&#x4ECB;&#x7ECD;&#x4E86;&#xFF0C;&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x662F;&#x5E76;&#x884C;&#x7684;&#xFF0C;&#x5F53;&#x6211;&#x4EEC;&#x9700;&#x8981;&#x7ED8;&#x5236;3&#x4E2A;&#x9876;&#x70B9;&#xFF0C;GPU&#x5C06;3&#x4E2A;&#x9876;&#x70B9;&#x6570;&#x636E;&#xFF0C;&#x5206;&#x644A;&#x5230;3&#x4E2A;GPU&#x903B;&#x8F91;&#x5355;&#x5143;&#x5E76;&#x884C;&#x5904;&#x7406;&#xFF0C;&#x6BCF;&#x4E2A;GPU&#x903B;&#x8F91;&#x5355;&#x5143;&#x540C;&#x65F6;&#x6267;&#x884C;&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x7A0B;&#x5E8F;&#x3002;</p>
<p>&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x4E5F;&#x662F;&#x5E76;&#x884C;&#x7684;&#xFF0C;&#x4E0D;&#x8FC7;&#x6267;&#x884C;&#x7684;&#x6B21;&#x6570;&#x4E0D;&#x662F;&#x9876;&#x70B9;&#x4E2A;&#x6570;&#xFF0C;&#x800C;&#x662F;&#x5C4F;&#x5E55;&#x50CF;&#x7D20;&#x4E2A;&#x6570;&#x3002;</p>
<p>&#x4E3E;&#x4F8B;&#x7ED8;&#x5236;&#x4E00;&#x4E2A;960x540&#x7684;&#x957F;&#x65B9;&#x5F62;&#xFF0C;&#x6BCF;&#x4E00;&#x4E2A;&#x50CF;&#x7D20;&#x70B9;&#x7684;&#x989C;&#x8272;&#xFF0C;&#x90FD;&#x662F;&#x901A;&#x8FC7;&#x6267;&#x884C;&#x4E00;&#x6B21;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x6765;&#x5F97;&#x5230;&#xFF0C;&#x90A3;&#x4E48;GPU&#x9700;&#x8981;&#x6267;&#x884C;960x540&#x6B21;&#x3002;</p>
<pre><code>&#x9876;&#x70B9;&#x6570;&#x8D8A;&#x591A;&#xFF0C;&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x6267;&#x884C;&#x6B21;&#x6570;&#x8D8A;&#x591A;&#x3002;
&#x5C4F;&#x5E55;&#x5206;&#x8FA8;&#x7387;&#x8D8A;&#x9AD8;&#xFF0C;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x6267;&#x884C;&#x6B21;&#x6570;&#x8D8A;&#x591A;&#x3002;
&#x8FD9;&#x91CC;&#x53EF;&#x4EE5;&#x63A8;&#x51FA;&#x624B;&#x6E38;&#x5E38;&#x89C1;&#x7684;&#x4E24;&#x79CD;&#x4F18;&#x5316;&#x65B9;&#x5F0F;&#xFF1A;&#x51CF;&#x5C11;&#x9876;&#x70B9;&#x3001;&#x964D;&#x4F4E;&#x5206;&#x8FA8;&#x7387;&#x3002;
</code></pre><h3 id="1&#x7B80;&#x5355;&#x7684;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;"><a name="1&#x7B80;&#x5355;&#x7684;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;" class="anchor-navigation-ex-anchor" href="#1&#x7B80;&#x5355;&#x7684;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;"><i class="fa fa-link" aria-hidden="true"></i></a>1.&#x7B80;&#x5355;&#x7684;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;</h3>
<pre><code class="lang-glsl"><span class="hljs-meta">#version 330</span>
<span class="hljs-keyword">in</span> <span class="hljs-type">vec4</span> v_color;
<span class="hljs-keyword">layout</span>(<span class="hljs-keyword">location</span> = <span class="hljs-number">0</span>) <span class="hljs-keyword">out</span> <span class="hljs-type">vec4</span> o_fragColor;
<span class="hljs-type">void</span> main()
{
    o_fragColor = v_color;
}
</code></pre>
<p>&#x8FD9;&#x5C31;&#x662F;&#x7B2C;3&#x7AE0;&#x7528;&#x7684;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#xFF0C;&#x4EC5;&#x5B9E;&#x73B0;&#x4E86;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x7684;&#x6700;&#x57FA;&#x7840;&#x529F;&#x80FD;&#x3002;</p>
<h3 id="2&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x8BED;&#x6CD5;"><a name="2&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x8BED;&#x6CD5;" class="anchor-navigation-ex-anchor" href="#2&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x8BED;&#x6CD5;"><i class="fa fa-link" aria-hidden="true"></i></a>2.&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x8BED;&#x6CD5;</h3>
<h4 id="21-&#x7248;&#x672C;&#x9650;&#x5B9A;"><a name="21-&#x7248;&#x672C;&#x9650;&#x5B9A;" class="anchor-navigation-ex-anchor" href="#21-&#x7248;&#x672C;&#x9650;&#x5B9A;"><i class="fa fa-link" aria-hidden="true"></i></a>2.1 &#x7248;&#x672C;&#x9650;&#x5B9A;</h4>
<pre><code class="lang-glsl"><span class="hljs-meta">#version 330</span>
</code></pre>
<p>&#x5728;&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x91CC;&#x8BB2;&#x4E86;&#xFF0C;&#x8FD9;&#x91CC;&#x5C31;&#x4E0D;&#x91CD;&#x590D;&#x4E86;&#x3002;</p>
<h4 id="22-&#x8F93;&#x5165;&#x53D8;&#x91CF;"><a name="22-&#x8F93;&#x5165;&#x53D8;&#x91CF;" class="anchor-navigation-ex-anchor" href="#22-&#x8F93;&#x5165;&#x53D8;&#x91CF;"><i class="fa fa-link" aria-hidden="true"></i></a>2.2 &#x8F93;&#x5165;&#x53D8;&#x91CF;</h4>
<pre><code class="lang-glsl"><span class="hljs-keyword">in</span> <span class="hljs-type">vec4</span> v_color;
</code></pre>
<p>&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x7684;<code>&#x8F93;&#x51FA;&#x53D8;&#x91CF;</code>&#xFF0C;&#x4F20;&#x9012;&#x5230;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x7684;<code>&#x8F93;&#x5165;&#x53D8;&#x91CF;</code>&#x3002;</p>
<h4 id="23-&#x8F93;&#x51FA;&#x53D8;&#x91CF;"><a name="23-&#x8F93;&#x51FA;&#x53D8;&#x91CF;" class="anchor-navigation-ex-anchor" href="#23-&#x8F93;&#x51FA;&#x53D8;&#x91CF;"><i class="fa fa-link" aria-hidden="true"></i></a>2.3 &#x8F93;&#x51FA;&#x53D8;&#x91CF;</h4>
<pre><code class="lang-glsl"><span class="hljs-keyword">layout</span>(<span class="hljs-keyword">location</span> = <span class="hljs-number">0</span>) <span class="hljs-keyword">out</span> <span class="hljs-type">vec4</span> o_fragColor;
</code></pre>
<p>&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x7684;&#x529F;&#x80FD;&#xFF0C;&#x5C31;&#x662F;&#x8BA1;&#x7B97;&#x989C;&#x8272;&#xFF0C;&#x7136;&#x540E;&#x8F93;&#x51FA;&#x7ED9;&#x663E;&#x5361;&#x3002;
&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x6709;&#x4E00;&#x4E2A;&#x6216;&#x591A;&#x4E2A;&#x8F93;&#x51FA;&#x53D8;&#x91CF;&#xFF0C;&#x4EE5;<code>out</code> &#x4FEE;&#x9970;&#xFF0C;&#x8FD9;&#x91CC;&#x5C31;&#x662F; <code>o_fragColor</code>&#x3002;</p>
<pre><code>&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x53EF;&#x4EE5;&#x7531;&#x591A;&#x4E2A;&#x8F93;&#x51FA;&#x53D8;&#x91CF;&#xFF0C;&#x8F93;&#x51FA;&#x5230;&#x591A;&#x4E2A;&#x6E32;&#x67D3;&#x76EE;&#x6807;(MRT)&#x3002;
&#x4F8B;&#x5982;&#x5728;Unity UI&#x4E0A;&#x663E;&#x793A;&#x6A21;&#x578B;&#x65F6;&#xFF0C;&#x53EF;&#x4EE5;&#x5C06;&#x6A21;&#x578B;&#x6E32;&#x67D3;&#x5230;RTT&#xFF0C;&#x6B64;&#x65F6;RTT&#x5C31;&#x662F;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x7684;&#x6E32;&#x67D3;&#x76EE;&#x6807;&#x3002;
</code></pre><h4 id="24-&#x51FD;&#x6570;&#x903B;&#x8F91;"><a name="24-&#x51FD;&#x6570;&#x903B;&#x8F91;" class="anchor-navigation-ex-anchor" href="#24-&#x51FD;&#x6570;&#x903B;&#x8F91;"><i class="fa fa-link" aria-hidden="true"></i></a>2.4 &#x51FD;&#x6570;&#x903B;&#x8F91;</h4>
<pre><code class="lang-glsl"><span class="hljs-type">void</span> main()
{
    o_fragColor = v_color;
}
</code></pre>
<p>&#x5165;&#x53E3;&#x51FD;&#x6570; <code>main()</code>&#xFF0C;&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x5C31;&#x662F;&#x5C06;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x8F93;&#x51FA;&#x7684;&#x989C;&#x8272;&#xFF0C;&#x76F4;&#x63A5;&#x8F93;&#x51FA;&#x3002;</p>
<h3 id="3-&#x63D2;&#x503C;"><a name="3-&#x63D2;&#x503C;" class="anchor-navigation-ex-anchor" href="#3-&#x63D2;&#x503C;"><i class="fa fa-link" aria-hidden="true"></i></a>3. &#x63D2;&#x503C;</h3>
<p>&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x8F93;&#x51FA;&#x989C;&#x8272;&#xFF0C;&#x4F5C;&#x4E3A;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x8F93;&#x5165;&#x989C;&#x8272;&#x3002;</p>
<p>&#x8FD9;&#x53E5;&#x8BDD;&#x662F;&#x5BF9;&#x7684;&#xFF0C;&#x4F46;&#x662F;&#xFF0C;<font color="red">&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x8F93;&#x51FA;&#x989C;&#x8272; &#x2260; &#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x8F93;&#x5165;&#x989C;&#x8272;</font>&#x3002;</p>
<p>&#x4ED4;&#x7EC6;&#x601D;&#x8003;&#xFF0C;&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x5BF9;&#x6BCF;&#x4E2A;&#x9876;&#x70B9;&#x6267;&#x884C;&#x4E00;&#x6B21;&#xFF0C;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x5BF9;&#x6BCF;&#x4E2A;&#x50CF;&#x7D20;&#x6267;&#x884C;&#x4E00;&#x6B21;&#xFF0C;&#x8FD9;&#x4E24;&#x4E2A;&#x7740;&#x8272;&#x5668;&#x7684;&#x76EE;&#x6807;&#x90FD;&#x4E0D;&#x4E00;&#x6837;&#x3002;</p>
<p><a href="../../imgs/opengl_draw_polygon/draw_quad/draw_quad_success.png" data-lightbox="10a48668-e2ef-4f2d-9950-e213725fff77" data-title=""><img src="../../imgs/opengl_draw_polygon/draw_quad/draw_quad_success.png" alt=""></a></p>
<p>&#x5728; <code>3.2 &#x753B;&#x4E2A;&#x6B63;&#x65B9;&#x5F62;</code> &#x8FD9;&#x4E00;&#x8282;&#xFF0C;&#x7ED8;&#x5236;&#x4E00;&#x4E2A;200x200 &#x5DE6;&#x53F3;&#x5927;&#x5C0F;&#x7684;&#x6B63;&#x65B9;&#x5F62;&#x3002;(&#x5982;&#x4E0A;&#x56FE;)
&#x6B63;&#x65B9;&#x5F62;&#x56DB;&#x4E2A;&#x9876;&#x70B9;&#xFF0C;&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x53EA;&#x9700;&#x8981;&#x6267;&#x884C;4&#x6B21;&#xFF0C;&#x800C;&#x9762;&#x5BF9;200x200&#x4E2A;&#x50CF;&#x7D20;&#xFF0C;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#xFF0C;&#x9700;&#x8981;&#x6267;&#x884C;200x200&#x6B21;&#x3002;
&#x53EA;&#x6709;&#x6B63;&#x65B9;&#x5F62;&#x56DB;&#x4E2A;&#x9876;&#x70B9;&#x7684;&#x90A3;&#x56DB;&#x4E2A;&#x50CF;&#x7D20;&#xFF0C;&#x624D;&#x80FD;&#x76F4;&#x63A5;&#x4ECE;&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x62FF;&#x5230;&#x989C;&#x8272;&#x6570;&#x636E;&#xFF0C;&#x90A3;&#x4E2D;&#x95F4;&#x7684;&#x50CF;&#x7D20;&#x989C;&#x8272;&#x6570;&#x636E;&#x4ECE;&#x54EA;&#x91CC;&#x6765;&#xFF1F;</p>
<font color="red">&#x63D2;&#x503C;</font>
&#x4E2D;&#x95F4;&#x7684;&#x50CF;&#x7D20;&#x989C;&#x8272;&#xFF0C;&#x90FD;&#x662F;&#x63D2;&#x503C;&#x5F97;&#x5230;&#x7684;&#x3002;

&#x5DE6;&#x4E0A;&#x89D2;&#x9876;&#x70B9;&#x989C;&#x8272;&#x662F;&#x7EA2;&#x8272;&#xFF0C;&#x53F3;&#x4E0A;&#x89D2;&#x9876;&#x70B9;&#x989C;&#x8272;&#x662F;&#x84DD;&#x8272;&#xFF0C;&#x53EF;&#x4EE5;&#x770B;&#x5230;&#x4E2D;&#x95F4;&#x989C;&#x8272;&#x662F;&#x7531;&#x7EA2;&#x8272;&#x3001;&#x84DD;&#x8272;&#x63D2;&#x503C;&#x6DF7;&#x5408;&#x800C;&#x6210;&#x3002;

<font color="red">&#x6CE8;&#x610F;&#xFF1A;&#x6240;&#x6709;&#x4ECE;&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x8F93;&#x51FA;&#x5230;&#x7247;&#x6BB5;&#x7740;&#x8272;&#x5668;&#x7684;&#x6570;&#x636E;&#xFF0C;&#x90FD;&#x4F1A;&#x63D2;&#x503C;&#xFF01;</font>




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